†order Cardiocarpales
Parent taxon: Spermatophyta according to K. A. Johnson et al. 2007
See also Andrews 1970
Sister taxa: Angiospermae, Condrusia, Magnoliopsida, Mtchedlishvilia, Renbernia
Subtaxa: Cardiocarpus Kamaraspermum
Distribution:
• Triassic of China (1 collection)
• Permian of Brazil (2), China (5), Germany (1), India (2), the Russian Federation (15), South Africa (1), United States (1: Michigan)
• Carboniferous of Canada (1: New Brunswick), Spain (1), United States (11: Illinois, Indiana, Michigan, Missouri, New Mexico, Ohio, Pennsylvania, West Virginia)
Total: 41 collections including 62 occurrences